Test directory: Cystine, 24Hr Urine

Ordering Code 4381
Test Name Cystine, 24Hr Urine
Preferred Specimen Urine, 24 Hour
Preferred Container 24 Hour Urine Container
No Preservatives
Other Specimen/Container None
Optimum Volume 20 mL
Collection Instructions Keep refrigerated during collection
Record entire 24 Hr Vol on container & requisition
Patient age & sex required on requisition.
Handling Instructions Mix sample well, measure total volume and remove aliquot
Freeze aliquot immediately.
Transport Requirements Oahu: Refrigerated
Airline: Frozen
Specimen Stability Ambient: Not Stable
Refrigerated: Not Stable
Frozen: 2 Months
Rejection Criteria Ambient, pH<2, Preservatives used, Refrigerated, Thawed
Avail. Stat NO
Analytic Time Up to 10 Days
Methodology Liquid Chromatography Mass Spectrometry (LCMS)
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of June 29, 2025.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Date of Birth ALL See report.
Total Volume ALL See report.
Cystine, 24 Hour Urine ALL See report.